由于memcache.Item确实使用了Time.Duration(纳秒),因此最好Expiration使用秒来指定字段: time.Second * 600内存缓存文档提到:// Expiration is the maximum duration that the item will stay// in the cache.// The zero value means the Item has no expiration time.// Subsecond precision is ignored.// This is not set when getting items.Expiration time.Duration